PLATE 11. 



Fig. 1. Nematobrachion sexspinosus H. J. Hansen. 



Anterior part of the body of a male, from the left side; X -r- 

 Left antennular peduncle of the same male, from the outer side; X 13. 

 Distal part of second peduncular joint with the basal part of third joint of left antennula 

 lale, from above; X 20. 

 Left maxilla of a male, from below; X 25. 



The four posterior abdominal segments of a male, from the left side; X |. 

 Major part of the same segments as shown in fig. le, from above; X 7. 

 The inner, the median, and the auxihary lobes of left copulatory organ, unrolled and seen 

 X40. 



Inner lobe with its processes of the same copulatory organ, from behind; X 78. 

 Distal half of the terminal process of the same organ, seen from the outer side; X 80. 



Fig. 2. Stylocheiron carinatum G. O. Sars. 



Left maxiDula of a female, from below; X 58. 



Left maxilla of the same female, from below; X 58. 



Fig. 3. Stylocheiron suhmii G. O. Sars. 



Fig. 3a. Left eye with stalk of a male, seen with the Ught transmitted and the lower half somewhat 

 diagrammatic, from the outer side; X 46. 



Fig. 3b. Sixth abdominal segment of a male, from the outer side; X 46. 



Fig. 4. Stylocheiron longicorne G. O. Sars. 



Fig. 4a. Left maxillula of a female, from below; X 42. 



Fig. 4b. Left maxilla of the same female, from below; X 42. 



Fig. 5. Stylocheiron abbreviatum G. O. Sars. 



Fig. 5a. Anterior part of an adult male (from Sta. 4734), from the left side; X scarcely 9. a?. 

 last peduncular joint of the endopod of the left antenna; V. second left thoracic leg — the distal half 

 with the chela omitted; mxp. left maxiUiped. 



Fig. 5b. Third peduncular joint with both flagella of left antennula of the same male, from the 

 outer side; X 15. 



Fig. 5c. Third peduncular joint with the whole upper flageUum and the major part of the lower 

 flageUum of the male left antennula shown in fig. a, from above; X 15. 



Fig. 5d. Left maxillula of a female from below; X 38. s. the distal spine on the end of the palp 

 more highly magnified, viz. X 128. 



Fig. 5e. Left maxilla of the same female, from below; X 38. 



Fig. 5f. The inner and the median lobes of left copulatory organ, unrolled and seen from behind; 

 X 185. p'. spine-shaped process; p^ terminal process; p'. proximal process; p<. lateral process. 



